Hundreds of millions of people around the world could run out of water soon. Experts are desperately searching for solutions to stave off "Day Zero" when the taps will run dry. But the recent discovery of a massive aquifer hidden beneath the U.S. coastline may offer the greatest hope for humanity.

The North Atlantic Right Whale is on the verge of extinction. The leading cause of death and injury to the whales is from ship strikes or entanglement in fishing lines. In this Breakthrough episode, we will hear from the leading experts and biologists who are racing to save this species.

Ask what the most dangerous animal is and most will say a lion or tiger, and true, they have the power to kill, but far more people are killed by hippos or buffalo, even domestic cows, pigs, and especially dogs.

Germany has some of Europe’s most famous and exciting cities, but that’s nothing compared to its natural wonders for those willing to step off the beaten track. Great lakes and rivers team with fish and birdlife, ancient and vast forests hide boars and lynx.

How do you decide nature's weirdest animal? Is it the sloth, that hangs upside down and moves so slowly that moss grows in its fur? Is it a sea pen that sits rooted to the seabed in endless darkness and emitting its own glow?

Like a sea of grass, the savannah, prairie, and meadows are among the most productive habitats on Earth, housing some of the greatest concentrations of big game and the most dramatic interactions of predator and prey.

An alarming decline in insect populations could devastate all life on earth. What's causing it, and can anything be done to stop it?

Across south-east Asia there are mega cities sinking fast. The race is on to predict how fast cities will sink.

When science and film team-up to explore the Einsteins of the oceans.

Equipped with a cutting-edge infrared drone, Doug Thron heads into disaster zones to save the cats and dogs that have been left behind.

Scientists have discovered that insects have remarkably sophisticated behaviors and even personalities quite similar to our own.

Join filmmaker Casey Anderson as he embeds in the Alaskan wilderness to follow the largest terrestrial carnivores in the world.

Nature is red in tooth and claw, animals face daily battles to protect themselves and secure the resources they need.

Equipped with a cutting-edge infrared drone, Doug Thron heads into disaster zones to save the cats and dogs that have been left behind.

We follow vets and volunteers who gave up their day jobs in the UK and moved to South Africa to rescue endangered animals.